เครื่องคิดเลขวันครบกำหนดคลอด

First trimester (Weeks 1–13)

Organ formation begins. Morning sickness common weeks 6–12. First ultrasound typically at 8–12 weeks.

Second trimester (Weeks 14–27)

Baby movements felt (quickening) around week 18–22. Anatomy scan ultrasound at week 20.

Third trimester (Weeks 28–40)

Rapid weight gain. Baby positions for birth. Full term at 39–40 weeks.

Due date accuracy

Only ~4% of babies arrive on their exact due date. Normal delivery is any time between 37–42 weeks.